Unfriendly and unhelpful staff

I went to Game in Golden Acre to buy my son a gift for his birthday . I picked up the gift and a wrapper and walked to the tills quickly. While I was at the tills I noticed that the wrappers in a box and I asked the cashier to check the prices for the one I had and the one from the box so I can compare the prices. She told me that is it not possible to check prices there and she said I must go back inside to check the price by the barcode scanning machine. I asked her if she can't ask one of the staff to quickly check for me and she gave me an attitude like I was asking a lot from her. she called a guy who was close by and said to him \ the lady is saying that you must check the price for this item at the price checking point (with a sarcastic tone)\" .The guy responded by saying why don't you show her where the machine is so that she can do it herself. The cashier then said she can't leave the till and go and check the price for me. I asked for the last time if this cannot be done on the till and she said no. I was really shocked and disappointed in both their attitude. They were unfriendly and unhelpful. It seemed I was being discriminated cause I am black and maybe younger."